While laser focused on the hunt, every hunter seeks consistency. Ravin .003 Premium Match-Grade Lighted Arrows offer just that – compensating for the added weight of lighted nocks to weigh the same as Ravin non-lighted arrows for identical flight accuracy. The ultra-bright nock assists hunters and shooters in locating arrows quickly, effortlessly – and consistently. For use in all Ravin models EXCEPT R500 Series Crossbows.These bolts are calibrated to weigh 400 grains with the use of a 100 grain field tip or broadhead.